src/hardware/hp-3457a/protocol.h

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2016 Alexandru Gagniuc <mr.nuke.me@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef LIBSIGROK_HARDWARE_HP_3457A_PROTOCOL_H
  21 #define LIBSIGROK_HARDWARE_HP_3457A_PROTOCOL_H
  22
  23 #include <stdint.h>
  24 #include "libsigrok-internal.h"
  25
  26 #define LOG_PREFIX "hp-3457a"
  27
  28 /* Information about the rear card option currently installed. */
  29 enum card_type {
  30         CARD_UNKNOWN,
  31         REAR_TERMINALS,
  32         HP_44491A,
  33         HP_44492A,
  34 };
  35
  36 struct rear_card_info {
  37         unsigned int card_id;
  38         enum card_type type;
  39         const char *name;
  40         const char *cg_name;
  41         unsigned int num_channels;
  42 };
  43
  44 /* Possible states in an acquisition. */
  45 enum acquisition_state {
  46         ACQ_TRIGGERED_MEASUREMENT,
  47         ACQ_REQUESTED_HIRES,
  48         ACQ_REQUESTED_RANGE,
  49         ACQ_GOT_MEASUREMENT,
  50         ACQ_REQUESTED_CHANNEL_SYNC,
  51         ACQ_GOT_CHANNEL_SYNC,
  52 };
  53
  54 /* Channel connector (front terminals, or rear card. */
  55 enum channel_conn {
  56         CONN_FRONT,
  57         CONN_REAR,
  58 };
  59
  60 struct dev_context {
  61         /* Information about rear card option, or NULL if unknown */
  62         const struct rear_card_info *rear_card;
  63
  64         enum sr_mq measurement_mq;
  65         enum sr_mqflag measurement_mq_flags;
  66         enum sr_unit measurement_unit;
  67         uint64_t limit_samples;
  68         float nplc;
  69         GSList *active_channels;
  70         unsigned int num_active_channels;
  71         struct sr_channel *current_channel;
  72
  73         enum acquisition_state acq_state;
  74         enum channel_conn input_loc;
  75         uint64_t num_samples;
  76         double base_measurement;
  77         double hires_register;
  78         double measurement_range;
  79         double last_channel_sync;
  80 };
  81
  82 struct channel_context {
  83         enum channel_conn location;
  84         int index;
  85 };
  86
  87 SR_PRIV const struct rear_card_info *hp_3457a_probe_rear_card(struct sr_scpi_dev_inst *scpi);
  88 SR_PRIV int hp_3457a_receive_data(int fd, int revents, void *cb_data);
  89 SR_PRIV int hp_3457a_set_mq(const struct sr_dev_inst *sdi, enum sr_mq mq,
  90                             enum sr_mqflag mq_flags);
  91 SR_PRIV int hp_3457a_set_nplc(const struct sr_dev_inst *sdi, float nplc);
  92 SR_PRIV int hp_3457a_select_input(const struct sr_dev_inst *sdi,
  93                                   enum channel_conn loc);
  94 SR_PRIV int hp_3457a_send_scan_list(const struct sr_dev_inst *sdi,
  95                                     unsigned int *channels, size_t len);
  96
  97 #endif